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A stair tread is the horizontal portion of a set of stairs on which a person walks. The tread can be composed of wood, metal, plastic, or other materials. In residential settings, treads can be covered in carpeting. Stair treads can come in non-slip varieties, particularly in commercial or industrial locations. [1]
These stairs often (including this example) illustrate the mathematical principle of glide plane symmetry: the mirror image with respect to the vertical center plane corresponds to a shift by one step. Alternating tread stairs are sometimes referred to as "witches stairs", in the supposed belief that they were created during an earlier era as ...
The nosing is the protrusion beyond the riser when vertical risers are used, or beyond the back of the tread below, when angled risers or no risers are used. Anti-slip strips or nosings may be applied. These stair parts can be manufactured from a variety of materials including aluminum, vinyl, and wood.
In two-story construction, openings are left in the floor system for a stairwell, in which stair risers and treads are most often attached to squared faces cut into sloping stair stringers. [citation needed] Interior wall coverings in light-frame construction typically include wallboard, lath and plaster or decorative wood paneling. [citation ...
A wooden stile in Esha Ness, Shetland. A stile is a structure or opening that provides passage for humans – rather than animals such as livestock – over or through a boundary. Common forms include steps, ladders, or narrow gaps. [1] Stiles are often built in rural areas along footpaths, fences, walls, or hedges that enclose domestic animals ...
The model shown here, retrofitted with metal steps in the 1990s, is among the oldest of the store's 40 escalators. Otis "L-type" escalators with distinctive wood treads (not shown) have operated in the store since 1927. Wooden treads on a 1930s Otis escalator, formerly at Wynyard railway station, Sydney, Australia
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